My new springs and pawls arrived today! This meant that I've been able to fix my rear wheel and ride this weekend. I'm still without the ebike but I popped into Summit Cycles to pick up a chain so asked how it was going at the same time. They're still working through the things that Specialized say to try but if they don't work then it's going to be a new motor. Anyway, here is my hub with spangly new springs and pawls fitted.